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VSC7927のメーカーはETCです、この部品の機能は「SONET/SDH 2.5Gb/s Laser Diode Driver」です。 |
部品番号 | VSC7927 |
| |
部品説明 | SONET/SDH 2.5Gb/s Laser Diode Driver | ||
メーカ | ETC | ||
ロゴ | |||
このページの下部にプレビューとVSC7927ダウンロード(pdfファイル)リンクがあります。 Total 12 pages
VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7927
SONET/SDH 2.5Gb/s Laser Diode Driver
Features
• Rise Times of Less Than 100ps
• High Speed Operation
(Up to 2.5 Gb/s NRZ Data)
• Differential or Single-Ended Inputs
• Single Supply
• ECL-Compatible Clock and Data Inputs
• Direct Access to Modulation and Bias FETs
• Data Density Monitors
• On-Chip Reclocking Register
• On-Chip Mux for Clocked or Non-clocked Appli-
cations
• On-Chip 50Ω Input Termination: Clock and Data
General Description
The VSC7927 is a single 5V supply, 2.5 Gb/s laser diode driver with direct access to the laser modulation
and bias FETs. Laser bias and modulation currents are set by external components allowing precision monitor-
ing and setting of the current levels. Data density outputs are provided to allow the user to adjust the laser bias
in high unbalanced data applications. Clock and data inputs are differentially terminated to 50Ω.
Applications
• SDH/SONET @ 622Mb/s, 1.244Gb/s, 2.488Gb/s
• Full Speed Fibre Channel (1.062Gb/s)
VSC7927 Block Diagram
DIN
DINTERM*
NDIN
50 Ω**
50 Ω**
DQ
M
U
X
CLK
CLKTERM*
NCLK
50 Ω**
50 Ω**
*Terminated to Off-chip Capacitor
**On Die Components
SEL
MK
NMK
DCC
VIP
VIB
IMOD
IOUT
NIOUT
IBIAS
IBIAS
MIP MIB
G52201-0, Rev 3.0
04/05/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected]
Internet: www.vitesse.com
Page 1
1 Page VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7927
SONET/SDH 2.5Gb/s Laser Diode Driver
Table 5: High Speed Inputs and ECL Outputs
Symbol
Parameter
Min Typ Max Units
Conditions
VIN
VCM
VOH
VOL
VIN
Single-ended Input Voltage Swing
300 — 1500 mVp-p VCM = -2.0V
Differential Input Common Mode Range -2.3 — -1.3
V VSS = -5.2V
ECL Output High Voltage
-1200 — — mV 50Ω to -2.0V
ECL Output Low Voltage
— — -1600 mV 50Ω to -2.0V
On-Chip Terminations
35 — 65
Ω
Table 6: Power Dissipation
Symbol
Parameter
IVSS Power Supply Current (VSS)
PD Total Power Dissipation
Min Typ Max Units
Conditions
—
—
120
mA
VSS = -5.5V, IMOD = IBIAS =
0mA, MK/NMK open circuit
VSS = -5.5V, IMOD = IBIAS =
— — 700 mW 0mA, RLOAD = 25Ω to GND,
MK/NMK terminated 50Ω to -2V
Table 7: Laser Driver DC Electrical Specifications
Symbol
Parameter
Min Typ
IBIAS
IMOD
Programmable Laser Bias Current
Programmable Modulation Current
2—
2—
VIB Laser Bias Control Voltage
——
VIP
VOCM
Laser Modulation Control Voltage
Output Voltage Compliance
——
— GND -
3V
Max
100
100
VSS +
2.1
VSS +
2.1
—
Units
mA —
mA —
Conditions
V IBIAS = 50mA
V IMOD= 60mA
V VSS = -5.2V
Table 8: Laser Driver AC Electrical Specifications
Symbol
Parameter
Min Typ
tR, tF
tSU
tH
Output Rise and Fall Times
Data to Clock Setup Time
Hold Time
——
— 50
20 50
Max
100
90
—
Units
ps
ps
ps
Conditions
25Ω load, 20%-80%,
20mA < IMOD < 60mA,
IBIAS = 60mA
—
—
Table 9: Package Thermal Specifications
Symbol
Parameter
Min Typ Max Units
θJCC Thermal Resistance from Junction-to-Case — 25 — °C/W
Conditions
Ceramic Package
G52201-0, Rev 3.0
04/05/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Internet: www.vitesse.com
Page 3
3Pages VITESSE
SEMICONDUCTOR CORPORATION
SONET/SDH 2.5Gb/s Laser Diode Driver
Preliminary Data Sheet
VSC7927
SOURCE
SOURCE
Figure 3: Single-Ended AC-Coupled
0.1µf
DIN
(CLK)
X
DINTERM
(CLKTERM)
0.1µf
NDIN
GND
(NCLK)
0.1µf
X
X
GND
GND
50 4.0K
-2.0V
50 6.4K
VSS
Figure 4: Differential AC-Coupled
0.1µf
0.1µf
0.1µf
GND
DIN
(CLK)
X
DINTERM
(CLKTERM)
X
NDIN
(NCLK)
X
GND
50 4.0K
-2.0V
50 6.4K
VSS
SOURCE
Figure 5: Differential DC-Coupled
DIN
(CLK)
X
GND
DINTERM
(CLKTERM)
X
NDIN
(NCLK)
X
50
50
4.0K
-2.0V
6.4K
-2.0V
VSS
Page 6
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Internet: www.vitesse.com
G52201-0, Rev 3.0
04/05/01/01
6 Page | |||
ページ | 合計 : 12 ページ | ||
|
PDF ダウンロード | [ VSC7927 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
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